^ I don't know that the city ordinance makes a distinction, allowing skateboard riders to skate across the street in the crosswalk section of the street, where elsewhere, skateboard use on street and sidewalks is excluded, but to me, to have such an exception would be too complex for most people to remember.

Based on examples I've seen in Beaverton, skateboard use on streets and sidewalks isn't a big deal, when people boarding use their heads, at least a little. I would say the skateboarder in Seth's picture, on a basic level, is imposing unnecessarily on other road users. Even with the picture being rather blurry, it's a fair guess that this particular guy is old enough to know better.